Those looking to book a house should do so before July 1. All sales of under-construction houses from July 1 will attract service tax with the finance ministry notifying tax on new services. Sale of immovable property will be deemed to be taxable unless entire consideration is paid after the issuance of completion certificate by a competent authority. However, service tax will be levied only on 25% of the gross sale value of property . Low-cost housing under the Jawaharlal Nehru National Urban Renewal Mission and the Rajiv Awas Yojana have been exempted from service tax that will begin to be levied from July 1.